| 1. | 3 ) the relations between modulation of the secondary moment and modulation of load is very osculation . when becomes greater , modulation of the secondary moment becomes greater ( 3 )次弯矩的调幅和荷载弯矩调幅两者紧密相关,可以相互转化,此消彼涨, 。 |
| 2. | The discussion is focused on the moment redistribution of the frames , the effects of the secondary moment and horizontal loads under the loads vertical and horizontal at the same time 分析了预应力框架中的次弯矩对弯矩重分布的影响以及水平荷载作用对弯矩重分布的影响。 |
| 3. | The authors provides a new method named limitation coefficient of tension stress method , which can calculate the quantity of prestressed tendons , taking the prestressing secondary moment into account 本文提出了计算预应力筋数量的“拉应力限制系数法”这一概念,并由之推导了考虑预应力次弯矩的计算公式。 |
| 4. | Crack of column equal to improve rotating ability of end of beam . therefore , it improves ability of moment modulation of end of beam . 9 ) the secondary moment has important influence on crack load ( 9 )次弯矩的存在对开裂荷载有较大的影响,在单层单跨框架中增加了梁端的开裂荷载,降低梁跨中的开裂荷载。 |
| 5. | 5 ) the secondary moment postpones coming of plastic hinge on frames . in other words , it reduces requisition of rotation ability of section . therefore , it maybe improve modulation ability of frame ( 5 )初始次弯矩的存在,推迟了梁端塑性铰的出现,也就是说降低了弯矩重分布对梁端转动能力的要求,从而有可能提高总调幅能力。 |
| 6. | 4 ) as designing , modulation of the secondary moment must be considered . but when the secondary moment is very great , the whole secondary moment as modulation is unfit . there maybe have a fit reducing coefficient ( 4 )设计调幅时,需考虑次弯矩调幅,但当次弯矩很大时,把次弯矩完全作为调幅是不适当的,应当有一相应的折减系数。 |
| 7. | For example still the arguments exist about the cracking controlling , the behavior of secondary moment and the re - distribution of internal forces , especially for the moment , of the prestressed concrete continues beam or frame 例如在对预应力混凝土连续梁和框架的裂缝控制、次弯矩以及结构的塑性内力重分布尤其是弯矩重分布这些问题上还存在着广泛的争论。 |
| 8. | 2 ) the secondary moment is an important factor on moment modulation . when is small , influence of the secondary moment on moment modulation is small . contrary , when is high , influence of the secondary moment is important ( 2 )次弯矩的调幅作用非常明显,当相对受压区高度较小时,次弯矩对调幅的影响作用也小;反之,当相对受压区高度较大时,次弯矩对调幅的影响作用越大,有时,甚至起控制作用。 |
| 9. | The secondary moment has no influence on ultimate limit loads . when is high , rotation ability of section is shortage . the secondary moment improve ultimate limit loads of frames by improvement rotation ability of section 但相对受压区高度较小时,截面本身具有足够的转动能力,此时次弯矩的存在不会影响框架结构的极限承载能力;当相对受压区高度较大时,截面本身的转动能力较小,此时次弯矩可以通过提高截面的转动能力而提高框架结构的承载能力。 |
| 10. | At first , this thesis analyzes the main causes in theory , which have effects on the redistribution of internal force and modulation of moment for the bonded post - tensioned partially prestressed concrete frame ( for short prestressed frame ) , including the relative height of compressive zone of section ( ) , secondary moment and types of load applying . then , this thesis analyzes the test of prestressed frame . then , a method , called curvature - force method , for nonlinear analysis of prestressed frame is put forward 本文首先从理论上分析了影响后张有粘结部分预应力混凝土框架(简称为预应力框架)内力重分布和弯矩调幅的主要因素,即相对受压区高度、次弯矩和加载方式等,并初步分析了两榀只加竖向荷载和两榀既加竖向荷载又加水平荷载的单层单跨预应力框架静力加载的试验。 |